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Finding the Fourth Proportional to 68,608.80, 102,913.20 and 67,226.40

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Solution

The fourth proportional to 68,608.80, 102,913.20 and 67,226.40 is: 100,839.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    68,608.80 : 102,913.20 = 67,226.40 : x
  2. Step 2: Convert to fraction form
    68,608.80/102,913.20 = 67,226.40/x
  3. Step 3: Cross multiply
    68,608.80x = 102,913.20 × 67,226.40
  4. Step 4: Simplify right side
    68,608.80x = 6,918,483,948.48
  5. Step 5: Solve for x
    x = 6,918,483,948.48/68,608.80
  6. Step 6: Final answer
    x = 100,839.60

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.